perp数学一道求高手

orangerecord · 发表于 2011-7-27 17:51:31

before being simplified, the instructions for computing income tax in country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of country R's currency and 1 percent of one's annual income. Which of the following represents the simlified formula for computing the income tax, in country R's currency, for a person in that country whose annual income is I (大写i)? 问题没太读懂

A. 50+I/200
B. 50 +3I/100
c. 50+I/40
D. 100+I/50
E. 100+3I/100

garlicwu · 发表于 2011-7-27 18:44:37

我的理解：

tax=2%*I + (1%*I + 100)/2 = 50 + I/40

orangerecord · 发表于 2011-7-27 18:54:55

明白了我没看懂题谢咯

perp数学一道求高手

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